The researchers found cerebral fructose levels rose significantly in response to a glucose infusion, with minimal changes in fructose levels in the blood. They surmised that the high concentration of fructose in the brain was due to a metabolic pathway called the polyol pathway that converts glucose to fructose.

Keep in mind watching this that our stomachs produce gastric acids and other compounds that help digest food along with our fermenting microbial friends. And that heating can change the chemical structure of foods trading one thing for another, for better or worse, and more often than not it’s probably the latter. Cooking also leaches or evaporates a certain amount of nutrients. However like drying food, cooking can also concentrate nutrient in the portions we eat due to reduced water content. Food is complicated.

What the video doesn’t cover however is that raw food surfaces are also covered in living microorganisms that studies have shown don’t completely wash off, even after sterilisation attempts. Endophytes also live inside plants and may contribute to the digestive microbiome. One study mentioned by Christopher Lowry below showed spinach has over 800 endophyte species. Cooking not only kills the plants but also these microorganisms that may be acting as probiotics.